Draft chamber



FIG. 1 is a front view of the draft chamber;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a left-side view thereof; and,

FIG. 7 is a perspective view looking from the upper left-side direction of the draft chamber.

The dashed lines immediately adjacent to the claimed edge of the opening in FIGS. 3 and 7 represent the boundaries of the claimed design and do not form any part of the claimed design. 

The ornamental design for a draft chamber, as shown and described. 